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Defect structure of the mixed ionic–electronic conducting Sr[Ti,Fe]Ox solid-solution system — Change in iron oxidation states and defect complexation

Drahus, Michael D. and Jakes, Peter and Erdem, Emre and Eichel, Rüdiger-A. (2011):
Defect structure of the mixed ionic–electronic conducting Sr[Ti,Fe]Ox solid-solution system — Change in iron oxidation states and defect complexation.
In: Solid State Ionics, pp. 47-51, 184, (1), ISSN 01672738, [Online-Edition: http://dx.doi.org/10.1016/j.ssi.2010.09.045],
[Article]

Abstract

The oxidation/reduction behavior of iron in the Sr[Ti1 − yFey]Ox solid-solution system, for y set membership, variant [0.002; 0.05], under various oxygen partial pressures was examined through the use of electron paramagnetic resonance (EPR) spectroscopy. The results indicate that iron has been induced to move between di- tri- and tetravalent oxidation states. This results with the centers functioning as either a source (oxidation) or as a sink (reduction) for electrons. In particular it is shown that the reducibility of iron decreases with increasing iron content.

Item Type: Article
Erschienen: 2011
Creators: Drahus, Michael D. and Jakes, Peter and Erdem, Emre and Eichel, Rüdiger-A.
Title: Defect structure of the mixed ionic–electronic conducting Sr[Ti,Fe]Ox solid-solution system — Change in iron oxidation states and defect complexation
Language: English
Abstract:

The oxidation/reduction behavior of iron in the Sr[Ti1 − yFey]Ox solid-solution system, for y set membership, variant [0.002; 0.05], under various oxygen partial pressures was examined through the use of electron paramagnetic resonance (EPR) spectroscopy. The results indicate that iron has been induced to move between di- tri- and tetravalent oxidation states. This results with the centers functioning as either a source (oxidation) or as a sink (reduction) for electrons. In particular it is shown that the reducibility of iron decreases with increasing iron content.

Journal or Publication Title: Solid State Ionics
Volume: 184
Number: 1
Uncontrolled Keywords: Strontium titanate ferrite; Multi-valent iron; Oxygen vacancy; Charge compensation; Solubility limit
Divisions: DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation > Subproject B1: EPR-Investigations of defects in ferroelectric ceramic material
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 05 Aug 2011 12:49
Official URL: http://dx.doi.org/10.1016/j.ssi.2010.09.045
Additional Information:

SFB 595 B1

Identification Number: doi:10.1016/j.ssi.2010.09.045
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